I just thought I would mention that when the dig here gets hard (I've got proper digging tools) I use an impact drill with a chisel. I also have a concrete breaker but it's heavy.Click "My Coop" link and it will take you there.
I fear now that I will be all alone in the Cafe for hours while I await the return of all my friends who are interested in perusing that monstrosity I wrote...
The ground is very hard in places here.